Elemental is a pure substance composed of
the same element. The state in which an element exists in its elemental form is
called the free state of the element. In general, the properties of elemental
matters are closely related to the properties of their elements, especially
chemical properties. For example, many metals are very metallic, then their
elemental reducibility is very strong. The elementality of different types of
elements, the difference in their properties is most prominently reflected in
the structure. In contrast to elemental matter, pure substances composed of
multiple elements are called compounds.
The element must be a pure substance composed of one element, so the mixture cannot be elemental. An element may have several elements, such as oxygen (O₂), ozone (O₃), tetrameric oxygen (O₄, a new type of oxygen molecule synthesized by a scientist in Italy), and red oxygen (O₈). Although any of these substances is elemental because they are pure substances composed of the same element, oxygen and ozone mixed together cannot be regarded as pure, it is a mixture of the same elements. In general, the properties of elementality are closely related to the properties of its elements. For example, many metals are very strong in nature, then their elemental reducibility is very strong. The elementality of different types of elements, the difference in their properties is most prominently reflected in the structure.
Elementary Substance,The Simple Substance, Pure Substance,Single Substance WUHAN RUISUNNY CHEMICAL CO. LTD , https://www.ruisunny-chem.com
Since the National Development and Reform Commission's Major Technical Equipment Coordination Office held a national conference on large-scale localization of petrochemical equipment in Shenyang in April this year, Sinopec has intensified its work on localization of one million tons of ethylene major equipment. At the beginning of May, the leading group of China National Petrochemical's major equipment localization team heard reports on the progress of key research projects such as ethylene cracker compressors, propylene refrigeration compressors, large-scale extrusion granulation units, and high-nickel alloy tubing. The deployment of domestically-developed equipment for the overall deployment. Recently, Sinopec also formulated localization projects such as one million tons of ethylene cracker compressors, propylene refrigeration compressors, ethylene cold boxes, labyrinth seal compressors, and other localization projects. Tightening the investigation to strengthen tracking and coordination.
According to Zhang Jianhua, senior vice president of Sinopec Corp., Sinopec supported the long-standing domestic production of major equipment. It not only promoted the improvement of the technological level of domestic equipment manufacturing companies, but Sinopec also gained real benefits: First, it has been significantly enhanced. Equipment support capabilities. In recent years, the shortage of international equipment resources for special equipment has brought great pressure on equipment supply in the domestic petrochemical industry. Such large-scale units as ethylene “three machines†and circulating hydrogen compressors for oil refining are very tight on the global market, and foreign manufacturers such as GE, Siemens, and Mitsubishi are often unable to respond to domestic inquiry due to their full production tasks. From the 12 months in 2003 to the 22 to 24 months in 2007, the price has also increased nearly 1 times. Sinopec supported Shenchuang to successfully develop a circulating hydrogen compressor, which greatly eased the pressure on supply of materials and equipment. Compared with imported products, not only the price is low, the delivery time is shortened by 4 months, which effectively guarantees the needs of the project construction. The second is a significant reduction in procurement costs. After Sinopec and Yizhong Group jointly developed a successful forging welding structure hydrogenation reactor, Sinopec has purchased more than 60 hydrogenation reactors from a heavy group, saving procurement costs of 550 million yuan. The third is to significantly increase the bargaining power with foreign companies. Prior to the successful localization of large-scale air separation plants, they were basically monopolized by foreign companies. Foreign companies had reached a tacit agreement. The high price and long delivery time often left no room for negotiation. After successful domestic development, foreign companies have significantly reduced their prices.
It is understood that Sinopec is currently organizing the preparation of "Sinopec's "Eleventh Five-Year" major equipment localization development plan", has completed the first draft.
The reporter learned yesterday at the Sinopec's major equipment localization office that Sinopec is conducting post-evaluation work on key projects that have successfully tackled the “Ninth Five-Year Plan†and “Tenth Five-Year Plan,†summarizing the successful experience of completing the project, and studying and resolving the existing problems. Promote the achievement of equipment localization.